Posted in Maxum Manuals Maxum Sportboat Runabout 1700 1800 1900 2100 2400 Owners Manual. Posted in 2004 Maxum 1800 MX 18 inboard pleasure boat like new purchased in 2009 we are the second owners and have only had it in dry indoor storage used only ONCE in the past 6 years includes all original manuals and paperwork includes trailer with foldaway hitch and tons of accessories includes rigging ropes, tie downs, pair of dock hull fender buoy cushions, never installed Engine Serial Number: Hull Identification Number: This Owners Manual Supplement provides information about your boat that is not covered in the Sport Boat Maxum offers a Limited Warranty on each new Maxum purchased through an authorized Maxum dealer.